Trunnion-box lining for oscillating engines



UNITED STATES PATENT OFFICE.

JOHN A. REED, OF JERSEY CITY, NEW JERSEY.

TRUNNION-BOX LINING FOR OSCILLATING ENGINES.

Specification of Letters Patent No. 24,663, dated July 5, 1859.

To all whom it may concern.'

Be it known that I, JOHN ANDREW REED, of Jersey City, in the county of Hudson and State of New Jersey, have invented a new and Improved Trunnion-Box Lining for Oscillating Engines; and I do hereby declare that the following is a full, clear, and exact description of the same, reference being had to the accompanying drawings, making a part of this specification, in which- Figure l, exhibits a vertical section of one of the trunnion boxes and trunnions of an oscillating-engine. Fig. 2, is a trans verse vertical section of the engine, taken through both trunnion boxes. Fig. 3, is a perspective View of one of the trunnion box linings.

Similar letters of reference denote like parts in all the figures.

My invention consists in the employment, in combination with a trunnion having a conical exterior, of a trunnion box lining which enters the box from the exterior thereof and which fits to the exterior of the trunnion like a cap, and which, by being slit from the center across the head and along one side, is made in a certain degree elastic so that it may press equally tight all around the interior of the box and all around the exterior of the trunnion as it is forced up against the trunnion by pressure upon its outer end to compensate for Wear, and hence may always keep the trunnion true.

To enable others skilled in the art to make and use my invention, I will proceed to describe its construction and operation.

A, is the cylinder having its trunnions C, C, solid and of conical f rm and each having formed upon or ri 'dly secured to its extremity a central screy a.

B, B, are the trunnion boxes which also constitute steam chests anl valves, having ports in the faces next the cylinder to operate in combination with ports in corresponding faces at the sides of the cylinder, for the induction and eduction of the steam. The trunnion boxes B, B, are bored cylindrically to a diameter very little larger than" that of the largest part of the trunnions.

D, D, are the trunnion box linings made of brass or composition metal. These linings are bored internally to a conical form to tit the exterior of Vthe trunnions and turned externally to a cylindrical form to ft the interior of the boxes, and the outer ends are closed up with the exception of having central openings c c, for the screws a, cz, to pass through and having the slits b, b, continued from their sides across their heads as far as these central openings.

E, E, are nuts fitted to the screws a, a, outside of the linings D, D, to force up the linings D, D, to make them fit snugly around the trunnions.

(Z, (Z, are small keys inserted into slots cut for them in the interior of the trunnion boxes and entering the slits Z9, I), of the linings D, D, to prevent the possibility of the latter turning in the boxes.

The linings thus constructed, and inserted in the boxes from the outer ends thereof, may be set up by the nuts E, E, as often as required, by the wear of the trunnions and their bearings by the elasticity given to them by the slots are made to press equally all around the trunnions and always caused to be themselves supported all around and are prevented binding either on the trunnions or in the boxes, and the trunnions are kept true.

Other contrivances as, for instance, wedges may be employed in place of the screws and nuts to press up the linings D, D.

The interior of the trunnion-boxes and exterior of the linings D, D, may be slightly conical instead of cylindrical, the larges` portions of the cones being at the outer ends of the boxes.

What I claim as my invention and desire to secure by Letters Patent, is

The employment, in combination with the conical trunnions, of slit cap-like linings D, D, applied to the boxes witlrscrews and nuts or other equivalent means of forcing them up toward the sides of the cylinder, substantially as herein described.

JOHN A. REED.

Witnesses:

WM. TUsoH, J. W. CooMs. 

